You need to check and make sure the alternator is charging. You could have gotten a defective one or if you got a used one it may be bad. Get a digital multimeter and with the vehicle off check the voltage at the battery. Should be 12+ volts with a charged battery. Start the vehicle and check the voltage again, should be 13-14 volts or better. If no voltage increase check the big output terminal (thick red wire usually going to it) at the alternator and see it the alternator is putting out voltage. If no voltage other than battery voltage then the alternator is not working. This is assuming that the alternator has an internal voltage regulator (most now do). Without year/make/model/engine size it's very hard to give you decent direction other that generic help :-) **I am assuming you have tested the battery**
THIS WAS MY QUESTION, BECAUSE THE 3RD BRAKE LIGHT WAS BLINKING I THOUGHT THERE WAS A MAJOR PR0BLEM,TURNS OUT IT WAS THAT BOTH BULBS WERE BAD,CHANGED THEM AND EVERYTHING WAS FINE
The lights are blinking because there may be a problem with the electrical connection or a malfunction in the lighting system.
if your dash lights are fading in and out you probably need to go to auto zone and have your alternator test and a load test done on your battery
Decorative blinking lights work in a series. As long as the series is completed and a blinking specific light is in place you have a beautiful display of blinking decorative lights.
alternator
The LED lights are blinking on and off because they are designed to do so as a part of their normal operation.
The lights are blinking in the house because there may be an issue with the electrical wiring or a problem with the light bulbs.
Caution lights.
The lights are blinking on and off because there may be an issue with the electrical connection or a problem with the light bulb itself.
Turn signal lights that double as parking (marker lights) when not blinking.
This is likely to be a bad alternator or broken belt. This is common with GM cars, and it's happened to me more than once.
alternator